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Service Source 




Xserve RAID 



Updated: 31 March 2003 



© 2003 Apple Computer, Inc. All rights reserved. 



Xserve RAID Power Mac G4 - 1 



Service Source 




Basics 



Xserve RAID 



© 2003 Apple Computer, Inc. All rights reserved. 




Overview 



Xserve RAID is a storage system that provides high-performance, scalable data access 
and management. It was designed to work with Xserve but is also compatible with desktop 
computers back to the Power Mac G4 (Digital Audio), as long as the computer has system 
software OS X (version 10.2.3 or later). A host adapter card must be installed in these 
computers to allow connection to the Xserve RAID system. 




Xserve RAID offers dual independent RAID controllers, up to 14 hot-pluggable hard 
drives, and two hot-pluggable power supplies. Also featured are several connection 
options, including dual 2-gigabit fibre channel ports, dual Ethernet ports (for managing the 
system remotely), and dual uninterruptible power supply (UPS) ports. The system is 5.25 
inches (3U) high and can be mounted in a rack with four mounting posts. 

Important: Due to the weight of the unit, two people are necessary for unpacking, lifting, 
mounting, or replacing the Xserve RAID system in a rack. Do not attempt to lift or move 
the system without help from another person. 



Overview 



Xserve RAID Basics - 1 




Features 



Key features of Xserve RAID include: 
3U enclosure (5.25 inches high) 
rack optimized 

dual independent RAID controllers, each with a minimum of 128 megabytes (MB) of 
RAM cache 

up to 14 hot-swappable ATA-100 Apple Drive Modules, each with a minimum of 180 
gigabyte (GB) capacity 
dual hot-swappable power supplies 
dual AC power connections 
dual hot-swappable cooling modules 

dual 2-gigabit (Gb) copper fibre channel ports, supporting point-to-point and fabric 
(switched) connections 

dual Ethernet ports for remote management of the system 
dual ports for uninterruptible power supply (UPS) management 
Mac OS X compatibility (version 10.2 or later) 

Apple Fibre Channel PCI card (sold separately) with dual fibre channel connectors for 
host system 

optional dual battery backup for controller cache 
optional service parts kit 
optional drive modules 



Rack Mount 

Xserve RAID is designed to be mounted in a rack; however, rack mounting is optional. 
Because of the weight of the system, lifting or transferring Xserve RAID from a rack 
requires two people. 

For information on mounting Xserve RAID in a rack, see the Xserve RAID Setup Guide. 



2 -Xserve RAID Basics 



Features 



Quick-Swap Modules 

Several modules can be easily replaced in Xserve RAID without removing the system from 
its rack. Most of these modules are both redundant and hot-swappable. The following table 
is a quick reference to these modules: 

Table 1: Quick-Swap Modules 



Module 


Hot-swappable? 


Redundant? 


ATA Drives 


Yes 


Depends on RAID config 


Power Supplies 


Yes 


Yes 


Cooling modules 


Yes 


Yes 


Battery Modules 


Yes 


Yes 


Controller Modules 


No: System must be shut 
down first 


No: Upper controller 
manages left seven drives; 
lower controller manages 
right seven drives 



Identifier Light/Button 

The identifier light on the Xserve RAID front panel turns on when internal sensors or a 
systems administrator detects a problem with the unit. The light can also be turned on by 
pressing the identifier button. This indicator will help you locate which Xserve RAID in a 
rack needs servicing. Note: A duplicate identifier light/button is on the unit's back panel. 

Hot-Pluggable ATA Drives 

Xserve includes fourteen hard drive bays at the front of the server, each of which supports 
a hot-pluggable ATA/100 drive module available only from Apple. You can replace or install 
hard drives while the server is running; you do not need to shut down or open the server 
first. A status light on the front of each drive indicates when it is safe to remove the drive 
without losing data. For more information, see "Hard Drive" in the Take Apart chapter. 

RAID Controller Modules 

Xserve RAID includes two controller modules, each with a minimum of 128 MB RAM. The 
top controller manages the seven drive modules on the system's left side (viewed from the 
front of the system); the bottom controller manages the seven drive modules on the right. 
Each controller module consists of the controller card, processor, and memory. 



Features 



Xserve RAID Basics - 3 



Power Supplies 

Xserve RAID includes two redundant power supplies, each with an AC power connection. 
When one power supply is not operational, the other provides power for the entire system. 
You can replace or install a power supply while the system is running. If one power supply 
is removed from the system, it must be reinstalled or replaced with a working one as soon 
as possible to prevent the drive modules from overheating. 

Cooling modules 

Xserve RAID includes two redundant cooling modules. If one cooling module is not 
operational, the other provides cooling for the entire system. You can replace or install a 
cooling module while the system is running. If one cooling module is removed from the 
system, it must be reinstalled or replaced with a working one as soon as possible to avoid 
an over-temperature condition, which causes the system to shut down. 

Backup Batteries 

Xserve RAID may include up to two optional, redundant backup batteries, which protect 
data in the controllers' cache in the event of a power interruption. The Xserve RAID power 
supplies charge the battery modules when they are installed in the system. The batteries 
can be replaced or installed while the system is running. 

To check a battery's charge when the module is out of the system, press the button on the 
underside of the module. All four green LEDs light when the battery module is fully 
charged. You can also use the monitoring or admin software to determine the battery's 
charge. See "Remote Monitoring" in the Troubleshooting chapter. 

For proper operation of the battery, check the status lights on the front of the module. See 
"Status Lights" in the Troubleshooting chapter. 

Host Adapter Card 

The Apple Fibre Channel card is a 7-inch PCI card designed for use with Xserve RAID 
systems. The card is installed in a host system so that it can connect, using one or two 
fibre channel cables, to the controller cards in Xserve RAID. The host card provides fibre 
channel communication in both directions simultaneously at up to 2 gigabits per second 
(Gb/sec). If the card is used in an Xserve, it must be installed in the top PCI slot of the 
dual-slot riser card. 

If host adapter cards are installed in each of two host systems, they can both connect to 
the same Xserve RAID: one host to the top controller card (for access to the left seven 
drives) and the other host to the bottom controller card (for access to the right seven 
drives). 



4 - Xserve RAID Basics Features 



Ports 

The standard configuration of Xserve RAID includes the following ports on the back panel: 
two 2-gigabit copper fibre channel ports, two gigabit Ethernet ports, and two ports for 
uninterruptible power supply (UPS) management. 

System administrators or service providers can connect a laptop computer or terminal to 
the Ethernet ports and then use command-line tools to change settings on the server. 

Note: For a diagram of the ports location, see "Back Panel" in the Views chapter. 

Diagnostics 

Two types of diagnostics are available for Xserve RAID: 

• status lights 

• remote monitoring 

For more information, see "Diagnostic Tools" in the Troubleshooting chapter. 



Features Xserve RAID Basics - 5 




Service Source 



Take Apart 



Xserve RAID 



© 2003 Apple Computer, Inc. All rights reserved. 




General Information 



Tools 

No tools are required for removing or installing the following parts: hard drive, power 
supply, cooling module, controller module, and backup battery. Other parts require only a 
Phillips screwdriver. If the system is locked, you will also need the Allen wrench key that 
came with the system. 

Before Opening Xserve RAID 

Unlocking Xserve RAID 

If the system is in the locked position (the yellow security LED on the front panel is on), 
use the Allen key that came with the system to unlock it. 

Shutting Down 

You must shut down the system before replacing or installing all parts except the hard 
drives, power supplies, cooling modules, and backup batteries. Before shutting down, be 
sure to alert users that the system will be unavailable for a period of time. 

Warning: After shutting down the system, you must wait a few minutes before servicing it 
to allow internal components to cool. 

Electrostatic Discharge (ESD) Precautions 

Follow these steps to avoid damage from ESD before working inside Xserve RAID. 

1 . Shut down the system. 

2. Unplug all external cables except the power cords. 

3. Touch the Xserve RAID metal case to discharge static electricity. 

4. Unplug the power cords. 

5. With the help of another person, remove the system from the rack, and place it on a 
flat surface, preferably covered by an ESD mat. 

6. Put on an ESD wrist strap. 

7. To avoid static electricity building back up in your body, do not walk around the room 
until after you have finished working and closed the system. 

General Information Xserve RAID Take Apart - 1 




Hard Drive Module 



Xserve RAID includes fourteen hard drive bays at the front of the system. Drives come as 
modules attached to carriers; they are removed from or installed in the system as a unit. 

Note: Blank drive carriers, which may fill some of the hard drive bays, follow the same 
take-apart procedure as hard drives. If you are replacing a blank carrier with a drive 
module, instruct the system's administrator to keep the blank for possible future use. Blank 
carriers must be installed in all empty bays to maintain proper airflow through the system. 

Tools 

No tools are required for this procedure. 

Preliminary Steps 

Before you begin, make sure the drives are in the unlocked position. No other preliminary 
steps are required. You can replace or install hard drives while Xserve RAID is running; 
you do not need to shut down or open the unit first. 

Note: There are two LED indicators on the front of each drive. 

• The right LED shows drive status: a green light indicates the drive is good; a yellow or 
red light indicates the drive should be replaced or removed and reinserted. 

• The left LED shows drive activity: when the light is blinking, the system is reading from 
or writing to the drive. To avoid losing data, never remove a drive when the lower LED 
is blinking. 

WARNING: Drives must be in the unlocked position before you attempt to remove a drive. 
If the drives are locked, pulling on the drive to remove it could damage the drive handle. 

Part Location 



I II I IN ISI III 



I— I 



2 - Xserve RAID Take Apart 



Hard Drive Module 



Procedure 

1 . Make sure the drive being replaced is not in use by any application and that removing 
it will not disrupt the RAID scheme in use. 

2. Press the handle on the front of the drive module so that the handle pops out. 




3. Wait for the right LED on the drive to go out. Then grasp the drive handle, and pull the 
drive module out of the system. 




lmportant:To maintain proper airflow, do not leave a drive bay empty. If you permanently 
remove a drive, replace it with a blank drive module. 



Hard Drive Module 



Xserve RAID Take Apart - 3 




Power Supply 



Xserve RAID includes two redundant power supplies. When one power supply is not 
operational, the other provides power for the entire system. 

Tools 

No tools are required for this procedure. 

Preliminary Steps 

No preliminary steps are required. You can replace or install a power supply while the 
system is running; you do not need to shut down or open Xserve RAID first. 

Part Location 




4 - Xserve RAID Take Apart 



Power Supply 



Procedure 

1 . For the power supply you want to replace, unplug the power cord from the power 
source. 

2. Lift the clip that holds the power cord in place and remove the cord from the back of 
the power supply. 

3. Press in the small latch on the power supply handle, and pull down to unlock it. Then 
holding the handle, pull the power supply straight out the back of the system. 





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Warning: Do not reach inside the system when removing a power supply or when the 
power supply is out of the system. 

Important: When you remove a power supply from the system, be sure to replace it with a 
working power supply as soon as possible to prevent the system from overheating. 



Power Supply 



Xserve RAID Take Apart - 5 




Cooling module 



Xserve RAID includes two redundant cooling modules. If one cooling module is not 
operational, the other provides cooling for the entire system. 

Tools 

No tools are required for this procedure. 

Preliminary Steps 

No preliminary steps are required. You can replace or install a cooling module while the 
system is running; you do not need to shut down or open Xserve RAID first. 

Part Location 



\fMWv 




■few?, 



6 - Xserve RAID Take Apart 



Cooling module 



Procedure 

1 . Press apart the two latches on the back of the cooling module. 

2. Holding the cooling module by the latches, pull it straight out the back of the Xserve 
RAID enclosure. 



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Important: When you remove a cooling module from the system, be sure to replace it with 
a working cooling module as soon as possible to prevent the system from overheating. 



Cooling module 



Xserve RAID Take Apart - 7 




Controller Module 



Xserve RAID includes two controller modules. The top controller manages the seven drive 
modules on the system's left side (viewed from the front of the system); the bottom 
controller manages the seven drive modules on the right. 

The controller module consists of the controller card, processor, and memory. This 
procedure explains how to remove the controller module from the enclosure and how to 
open the module's case to access the controller card. 

Tools 

No tools are required for this procedure. 

Preliminary Steps 

You must shut down the system, using the admin or monitoring software, before removing 
or installing a controller module. 

Part Location 



•y . «. m-. B = ." 




HEP^R" 


ff >..»«:«■ « 





8 - Xserve RAID Take Apart 



Controller Module 



Procedure 

1 . Press apart the two latches on the back of the controller module. 

2. Holding the controller module by the latches, pull it straight back out of the enclosure. 




3. If you are removing the controller card from the case, remove the two screws on the 
front of the case, and slide out the bottom half of the case. 





v 



Note: The controller card is attached to the bottom of the controller module case. Do not 
attempt to separate the card from the bottom case. 

Replacement Note: If you are replacing the controller card with a new card, you must 
transfer the processor and memory modules to the replacement card. 



Controller Module 



Xserve RAID Take Apart - 9 




Processor 



The processor sits on the controller card inside the controller module case. 

Tools 

The only tools required for this procedure are a Phillips screwdriver and needlenose pliers. 

Preliminary Steps 

Before you begin, remove the controller module from the enclosure. 

Part Location 




10 - Xserve RAID Take Apart 



Processor 



Procedure 

1 . Remove the two screws on the front of the controller module case. 

2. Slide out the bottom half of the case. 

Note: The controller card is attached to the bottom of the controller module case. Do 
not attempt to separate the card from the bottom case. 





3. Place the controller card on a flat sturdy surface. Using needlenose pliers, compress 
the two plastic pegs holding the processor in place. Then, holding the processor by 
the edges, pull it straight up to disconnect it from the controller card. 




Important: After you replace the processor, be sure to cover the Ethernet label on the 
controller module with the Ethernet label included with the new processor. 



Processor 



Xserve RAID Take Apart - 1 1 




Memory (DIMMs) 



The memory DIMM sits on the controller card inside the controller module case. 

Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the controller module from the enclosure. 

Part Location 




12 - Xserve RAID Take Apart 



Memory (DIMMs) 



Procedure 

1 . Remove the two screws on the front of the controller module case. 

2. Slide out the bottom half of the case. 

Note: The controller card is attached to the bottom of the controller module case. Do 
not attempt to separate the card from the bottom case. 





v 



3. Release the two latches that hold the memory DIMM in place. 

4. Holding the DIMM by the edges, disconnect it from the controller card. 




Memory (DIMMs) 



Xserve RAID Take Apart - 13 



Replacement Note: When installing the DIMM, be sure to insert it at an angle into the 
DIMM connector. Once the DIMM is connected, rotate it down flush with the controller 
card until you feel the latches snap into place. 




14 - Xserve RAID Take Apart 



Memory (DIMMs) 




Battery Module 



Xserve RAID may include up to two optional, redundant backup battery modules, which 
protect data in the controllers' cache in the event of a power interruption. 

The battery module consists of a battery cell, battery recharger board, battery light pipe, 
and battery cable. This procedure explains how to remove the battery module from the 
enclosure. 

Tools 

No tools are required for this procedure. 

Preliminary Steps 

No preliminary steps are required. You can replace or install a battery module while the 
system is running; you do not need to shut down or open Xserve RAID first. 

Part Location 



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Battery Module 



Xserve RAID Take Apart - 15 



Procedure 

1 . Squeeze together the two latches on the back of the battery module, and holding it by 
the handle, pull it straight back. 

2. Remove the battery module from the Xserve RAID enclosure. 



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Note: When first installed, a new battery module will take several hours to charge 
completely. The system must be turned on to charge the battery. 

lmportant:To maintain proper airflow, do not leave a battery bay empty. If you 
permanently remove a battery module, replace it with a blank battery cover, inserted as 
illustrated. 







5^ 



16 - Xserve RAID Take Apart 



Battery Module 




\Q^ll Removing Xserve RAID from 
the Rack 



You must remove Xserve RAID from its rack to access all parts except the hard drive, 
power supply, cooling module, controller module, processor, memory, and backup battery. 

Important: Due to the weight of the system, do not attempt to lift or move the system 
without help from another person. 

Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

See "Before Opening Xserve RAID" at the beginning of this chapter. 

Procedure 

1 . Remove the two screws that secure the system to the front rail of the rack. 




**•-© 



Removing Xserve RAID from the Rack 



Xserve RAID Take Apart - 17 



With one person supporting each side of the unit, slide the system out of the rack and 
place it on a sturdy, flat surface covered by an ESD mat. 




Replacement Note: When reinstalling the system, be sure to slide it all the way into the 
rack until it engages the small posts at the rear of the L-brackets. 



18 - Xserve RAID Take Apart 



Removing Xserve RAID from the Rack 




Top Cover 



You must remove the top cover to access all parts except the hard drive, power supply, 
cooling module, controller module, processor, memory, and backup battery. 

Tools 

The only tool required for this procedure is a Phillips screwdriver. 



Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. 



Part Location 




Top Cover 



Xserve RAID Take Apart - 19 



Procedure 

1 . Remove the eight mounting screws on each side of the top cover. 




2. Slide the top cover a short distance toward the back of the unit. 

3. Lift the top cover off the enclosure. 



20 - Xserve RAID Take Apart 



Top Cover 




Locking Switch 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 







■■ 










^^^■r ■ 




Locking Switch 



Xserve RAID Take Apart - 21 



Procedure 

1 . Disconnect the locking switch cable from the right front panel board. 

2. Remove the two screws that mount the locking switch to the chassis. 

3. Remove the locking switch from the bottom housing. 




22 - Xserve RAID Take Apart 



Locking Switch 




Front Bezel 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 




/ 



Front Bezel 



Xserve RAID Take Apart - 23 



Procedure 

1 . Disconnect the locking switch cable from the right front panel board. 

2. Disconnect the front panel board cable from the left and right front panel boards. 

3. Remove the four screws securing the bezel to the bottom housing. 




24 - Xserve RAID Take Apart 



Front Bezel 



4. Carefully pull the bezel a short distance straight back off the bottom housing, making 
sure the bezel clears the barrel of the locking mechanism. 

5. Disconnect the cable from the center front panel board. 

6. Remove the bezel from the housing. 




/ 



Note: If you are replacing the front bezel with a new bezel, you must transfer the following 
parts from the original bezel to the replacement bezel: left and right front panel boards and 
light pipes, front panel buttons, and center front panel board and light pipes. 



Front Bezel 



Xserve RAID Take Apart - 25 



Replacement Warning: When replacing the bezel, make sure you route the two branches 
of the front panel board cable straight up through the center front opening in the chassis. 
Otherwise, the front bezel may pinch the cable and damage it. 




26 - Xserve RAID Take Apart 



Front Bezel 




Midplane Board 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• All hard drives 

• Both power supplies 

• Both cooling modules 

• Both controller modules 

• Both backup batteries, if installed 

• Top cover 

• Front bezel 

Part Location 







"m 




Midplane Board 



Xserve RAID Take Apart - 27 



Procedure 

1 . Disconnect the front panel board cable and back panel board cables from the 
midplane board. 

2. Grasp the front half of the chassis and rotate 90 degrees up. 







3. Remove the six midplane board mounting screws. 

4. Remove the midplane from the bottom housing. 




28 - Xserve RAID Take Apart 



Midplane Board 



Replacement Note: When repositioning the front half of the chassis back into place, 
make sure the small hole in the center of the chassis fits over the peg in the chassis floor. 




Midplane Board 



Xserve RAID Take Apart - 29 




Center Front Panel Board 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• Top cover 

• Front bezel 

Part Location 




30 - Xserve RAID Take Apart 



Center Front Panel Board 



Procedure 

1 . Remove the two mounting screws on the center front panel board. 

2. Remove the board from the bezel. 



n 




Center Front Panel Board 



Xserve RAID Take Apart - 31 




Center Front Light Pipe 



Tools 

The only tools required for this procedure are a Phillips screwdriver and a small flat-blade 
screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• Top cover 

• Front bezel 

• Center front panel board 

Part Location 



w 



t 



32 - Xserve RAID Take Apart 



Center Front Light Pipe 



Procedure 

1 . Using a flat-blade screwdriver, carefully pry up the top center light pipe and shield and 
remove them from the bezel. 

2. Remove the bottom light pipe and shield from the bezel. 



* 



r 



r 






Center Front Light Pipe 



Xserve RAID Take Apart - 33 




Left Front Panel Board 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 




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34 - Xserve RAID Take Apart 



Left Front Panel Board 



Procedure 

1 . Disconnect the front panel board cable from the left front panel board. 

2. Remove the mounting screw. 

3. Remove the board from the enclosure. 




Left Front Panel Board 



Xserve RAID Take Apart - 35 




Right Front Panel Board 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 




r>>^'>; : > ^^ ^^^^^ j g "v:, -^ ^ ^v ^ H^S 



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,ty I.-J "-V ■"■■ " J 



36 - Xserve RAID Take Apart 



Right Front Panel Board 



Procedure 

1 . Disconnect the locking switch cable and the front panel board cable from the right 
front panel board. 

2. Remove the mounting screw. 

3. Remove the board from the enclosure. 




Right Front Panel Board 



Xserve RAID Take Apart - 37 




Left or Right Front Light Pipe 



Tools 

The only tools required for this procedure are a Phillips screwdriver and a flat-blade 
screwdriver. 



Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• Top cover 

• Front bezel 

• Right or left front panel board 

Note: The same light pipe is used behind both the left and right front panel boards. 

Part Location 

Light Pipe Behind Left Front Panel Board 





Light Pipe Behind Right Front Panel Board 



'~r 




38 - Xserve RAID Take Apart Left or Right Front Light Pipe 



Procedure 

1 . Using a flat-blade screwdriver, carefully pry up the light pipe and shield. 

2. Remove the light pipe and shield from the bezel. 




rr 




Replacement Note: The light pipes come with a black plastic shield. Make sure the shield 
is in correct position over the light pipe before you place the light pipe back into the bezel. 






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\ 



Left or Right Front Light Pipe 



Xserve RAID Take Apart - 39 




Front Panel Buttons 



Tools 

The only tools required for this procedure are a Phillips screwdriver and either a flat-blade 
screwdriver or needlenose pliers. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• Top cover 

• Front bezel 

• Left front panel board 

Note: The front panel button kit comes with both the system identifier button and the mute 
button. 



Part Location 





40 - Xserve RAID Take Apart 



Front Panel Buttons 



Procedure 

1 . Using needlenose pliers or a flat-blade screwdriver, carefully lift out the button shield 
from the bezel. 

2. Pry up the buttons and remove them from the bezel. 




Replacement Note: When replacing the buttons, be sure to orient them as illustrated 
below. 




Front Panel Buttons 



Xserve RAID Take Apart - 41 




Front Panel Cable 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the following: 

• Top cover 

• Front bezel 

Part Location 




42 - Xserve RAID Take Apart 



Front Panel Cable 



Procedure 

1 . Disconnect the front panel cable from the midplane board. 

2. Remove any tape holding the cable to the chassis. 

3. Route the cable out through the center opening in the chassis and remove the cable 
from the enclosure. 




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E H j 



Front Panel Cable 



Xserve RAID Take Apart - 43 




Rear Panel Cable 



Tools 

The only tool required for this procedure is a Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 




44 - Xserve RAID Take Apart 



Rear Panel Cable 



Procedure 

1 . Disconnect the rear panel cable from the midplane board and from the rear power 
button panel board or rear system ID panel board. 

2. Remove the cable from the enclosure. 




Rear Panel Cable 



Xserve RAID Take Apart - 45 




Rear System ID Panel Board 



The rear system ID panel board includes the system ID and mute buttons. 

Tools 

The only tool required for this procedure is a small Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 



j 

if 




If i> 

1 t 

m 


*K ' J 
J ■ 

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i m 




46 - Xserve RAID Take Apart 



Rear System ID Panel Board 



Procedure 

1 . Disconnect the rear panel cable from the rear system ID panel board. 

2. Remove the two panel board mounting screws. 

3. Remove the rear system ID panel board and its button cover from the enclosure. 





Rear System ID Panel Board 



Xserve RAID Take Apart - 47 




Rear Power Button Panel Board 



The rear power button panel board includes the on/off power button and light. 

Tools 

The only tool required for this procedure is a small Phillips screwdriver. 

Preliminary Steps 

Before you begin, remove the system from the rack and place it on a sturdy, flat surface 
and ESD mat. Then remove the top cover. 

Part Location 




v v if L< v ( j 




48 - Xserve RAID Take Apart 



Rear Power Button Panel Board 



Procedure 

1 . Disconnect the rear panel cable from the rear power button panel board. 

2. Remove the two panel board mounting screws. 

3. Remove the rear power button panel board and its button cover from the enclosure. 





Rear Power Button Panel Board 



Xserve RAID Take Apart - 49 



Service Source 




Troubleshooting 



Xserve RAID 



© 2003 Apple Computer, Inc. All rights reserved. 




Diagnostic Tools 



Xserve RAID includes built-in sensors that detect and report on hard drives, internal 
temperature, cooling module status or failure, and power status or failure. You can monitor 
the system's operation via these sensors and two diagnostic tools: indicator lights on the 
front and back of the system and remote monitoring software. 

Status Lights 

Status lights are located on the front and back panels of Xserve RAID. In addition, there 
are status lights on the host adapter card. 

Front Panel Status Lights 

The system's front panel status lights are shown in the figure and table below. 



Mute Button - 
A System Identifier Button and Light - 
2 A Drive Module Lock and Status Light - 



Power Supply Status Light 
Cooling System Status Light 
p Temperature Status Light 
Controller Status Light 




Drive Module 
Activity and 
Status Lights 



Fibre Channel Link Lights 



Diagnostic Tools 



Xserve RAID Troubleshooting - 1 



Table 1: Front Panel Status Lights 



Indicator 


LED Color 


Description 


Security lock 


Yellow 


Lock is engaged 


System identifier 


Yellow 


Indicates a hardware error or that 
someone has toggled it on; check the 
server monitoring application for more 
information 


Mute button 


No LED 


Press to turn off the alarm signalling an 
error condition 


Power supplies 


Green 
Red 


OK 

Failure (See "Power Supply Status Lights") 


Cooling modules 


Green 
Red 


OK 
Failure 


Temperature 


Green 
Red 


OK 

Over temperature 


RAID controller 
(one for each group 
of seven drives) 


Green 
Red 


OK 
Failure 


Host activity 


Blue 


Two rows of 23 LEDs show level of fibre 
channel activity on each host channel 


Fibre channel link 


Green 


Two LEDs indicate a link is established 


Drive module 
(right LED) 


Green 
Yellow 

Yellow/green flash 
Red 


Powered and running; good 
Prefailure condition; replace drive 
Rebuilding RAID 
Problem or failure; replace drive 


Drive module 
(left LED) 


Blinking blue 
No light 


Disk activity; do not remove drive 
No disk activity; drive can be removed 



2 - Xserve RAID Troubleshooting 



Diagnostic Tools 



Back Panel Status Lights 

The system's back panel status lights are shown in the figure below. General back panel 
status lights are listed in Table 3. Power supply status lights are in Table 4. 



Power Supply 
Status Lights 



Mute Button ■ 

System Identifier. 
Button and Light 



Controller Status Light 

Cooling Module Status Light 



■ Power 
Button 
and Light 



■ Battery 
Status 
Lights 




Fibre Channel Status Lights 

Ethernet Status 

Lights <•••> 



Table 2: General Back Panel Status Lights 


Indicator 


Color 


Description 


Power 


White 


On and OK 


System identifier 


Yellow 


Indicates a hardware error or that 
someone has toggled it on 


Mute button 


No LED 


Press to turn off alarm signalling an error 


Power supplies 




See "Power Supply Status Lights" 


Cooling modules 


Green 


OK 


Controllers 


Green 


OK 


Ethernet link 


Green 
Red 


OK 
Failure 


Fibre channel link 


Green 
Red 


OK 
Failure 


Batteries 


Green 
Red 


Charged and OK 
Failure 



Diagnostic Tools 



Xserve RAID Troubleshooting - 3 



Table 3: Power Supply Status Lights 



Power Supply Conditions 


Green LED 


Yellow LED 


Red LED 


No AC power to either power supply 


Off 


Off 


Off 


Power supply failure or no AC power to 
this power supply 


Off 


Off 


On 


AC power present; standby ouputs on 


Blinking 


Off 


Off 


Power supply DC outputs on and OK 


On 


Off 


Off 


Current limit 


On 


Off 


Blinking 


Predictive failure 


On 


Blinking/on 


Off 



Host Adapter Card Status Lights 

The host adapter card's status lights are shown in the figure and table below. 



Status Lights 




SFP Ports 



Table 4: Host Adapter Card Status Lights 



LED Color/Status 


Description 


No light 


Link established 


Blinking green 


Activity on the channel 


Yellow 


No link or there is an error condition 



4 - Xserve RAID Troubleshooting 



Diagnostic Tools 



RAID Admin and Disk Utility 

There are two applications for configuring and monitoring Xserve RAID systems: RAID 
Admin, included on a CD with the system, and Disk Utility [Is this "Apple RAID"??], which 
is part of Mac OS X or Mac OS X Server. Both applications reside on the host computer 
connected to the Xserve RAID system [??]. 

RAID Admin is used for the following: 

• Monitoring the status of one or more systems 

• Creating or deleting RAID arrays 

• Adjusting system settings, including system name and password, network address for 
each RAID controller, fibre channel communication speed, drive cache, controller 
cache, and LUN masking 

• Setting up email notification for system alerts 

Disk Utility is used to modify RAID arrays by adding striping or mirroring to existing RAID 
arrays. 

Note: For more information on RAID Admin and Disk Utility, see the document "Using 
RAID Admin and Disk Utility" on the RAID Admin CD that comes with the Xserve RAID 
system. 

Remote Monitoring 

Use the RAID Admin application to monitor the Xserve RAID system from a host 
computer. The application allows monitoring in the following areas, each of which is 
represented by a tab at the top of the RAID Admin window: 

• Info 

• Components 

• Drive & Arrays 

• Fibre Channel 

• Network 

Note: For information on adding and deleting systems to the RAID Admin monitoring list, 
see the document "Using RAID Admin and Disk Utility." 



Diagnostic Tools Xserve RAID Troubleshooting - 5 



Info 

Info reports system name, lock status, controller details, and whether there is a problem or 
power failure. 



[ Infu \ Cj&mppncnts | Driwi & Arrays | Fibre- Channel f Network | 



Name: 
Krvl-DLk: Unlocked 

Upper CflnlrDUer IDrlve^ l-7>- 



UpTlrTO! 6h r 25ni 
^nibienqTflfflperacui't' O'C 

3LUH5-. OK 



ServiLe ID. — 
Power State: ~ 



Lower Cflncrolter iDtivet 1-14 

kip Tim! 6tl_25m 
AnibienrTeniptraEun — 
Sijjcu* OK 



Components 

Components shows the operating information about the power supplies, RAID controllers, 
cooling modules, and cache backup batteries. Clicking the button for a component 
displays its details. 



I ln?D | Components- I Drives & Ait ayi I I ibre Channel | Network ! 

LefLPo wer Supply 



intuited Cotiporienct. 

15Z 1 



M4I 



OElS:iJSi:j®:i:' 






1Q ^ 






5r.jri.at OK 



6 - Xserve RAID Troubleshooting 



Diagnostic Tools 



Drive & Arrays 

Drives & Arrays shows details of each array, the drives in use, and the drives available. 
Choosing an array from the Array menu displays its details. 



Fibre Channel 

Fibre Channel shows information about each RAID controller and the type of fibre channel 
connection in use. 



J Info | Components | Drme-E & Arrays \ Fibre Channel [ Newark | 



■Upper CDnrr-flllei' IDrh>e& 1-73 

StaLui. Failure 

Topology: Arbitrated Loop 

Speed - Awo-Dhkt 

Worldwide Name: 50:00 39 JO:rjO:Ofl;Ql:K 

Hnru" L uup id Dteabted 



rLo*ei" Cflnrroiifir [Driven s-i+fr- 

StaLus-. I dure 

r apology: ~ 

Speed: — 
Wsrid Wde Name: 

Hard Loop 10! Disabled 



Network 

Network displays the IP address and related network details for each RAID controller. 













f t i 








inru 1 LompaniniE i unv» a Arrjyi 


Fihrt Channel | hetirork | 














rLfpper COnir u'ler IDNvefr [-7^ 1 




rLO*fl' Cflncrollpr I'Dflvet 8-l+fc 1 






































IPJSddrcss. 17.205.14.156 
Subnet Mas k 25 5J5 5 J 52 




IPAddrcis. 17.205.14.236 
Subnet Mask- 255 154 252 










UA£AdDV«5. 00 0*93 *0:+4 ES 
Sra^t Failure 




WCAddiw. 00:01:9**0:4 5 M 
Stku* Failure 










Speed -- 
Cohllsurt DHCP 




SpeeJ: — 
ConHsurfi DHCP . 










DHCFCNehl ID — 




DHCPCIIemlD* — * 





















Diagnostic Tools 



Xserve RAID Troubleshooting - 7 




Block Diagram 









Midplane 
















Power 








Drive Module 14 






5V 
Power 1 2V 
Supply 2 3.3V 

5Vsb 






ATA 100 


— ► 












Control 
Control 


Drive Module 13 














"O CO 

O .^ 
CO Q 
C >, 

s > 








ATA 100 




















10/100 Enet-* 


-► 


EMU 2 








Drive Module 12 
















ATA 100 


— ► 


























Drive Module 11 




















ATA 100 


— ► 




















RAID Controller 2 














2Gb FC-«-^ 


4 ATA 100 (7) 








Drive Module 10 






-^ 

Battery V 










ATA 100 












i 


k 1 


V 




Battery 2 


Drive Module 9 








Charge Off 
5V, Fantac 
















ATA 100 




















O 


71 








Blowers 


Drive Module 8 






1 &2 


L 


t: — ~ ;-► 








ATA 100 






I I 


Fan Control 
Power 












12CEMU2 






«c 








12CEMU 1 




V u 






Drive Module 7 




Q 
LU 

I 

LO 
C\J 
X 

o 

-C 
CO 

Lj 




5V 
Power 12V 
Supply 1 3.3V 

5Vsb 












ATA 100 






Control 
Control 












Drive Module 6 












ATA 100 
















Drive Module 5 




10/100 Fnet-^ 




EMU 1 








Serial -* — 


-► 


-^ 


► 






ATA 100 


























Drive Module 4 






** 








-* 






ATA 100 


— ► 










-* 
















2Gb FC < ► 


RAID Controller 1 


ATA 100 (7) 








Drive Module 3 






M 

Battery V 










ATA 100 
















Battery 1 


Drive Module 2 






Charge Off 
















ATA 100 
























Rear Button 
Board 




Drive Module 1 






m ► 






ATA 100 





























8 - Xserve RAID Troubleshooting 



Block Diagram 



Block Diagram Xserve RAID Troubleshooting - 9 



Service Source 




Views 



Xserve RAID 



© 2003 Apple Computer, Inc. All rights reserved. 




Exploded View 



Left Front Panel Board 922-5320 
Button Kit, Front Panel 076-0966 



Enclosure w/ Top Cover 922-5270 



-Light Pipe, 
Left or Right 
076-0967 




■ Right Front 
Panel Board 
922-5321 



Drive Module 180 GB 
661-2829 

Center Front Panel Board 
922-5328 



L Front Bezel 922-5322 



System Identifier 
Board 922-5389 



Battery Blank (Cover) - 
922-5407 



Cooling Module 922-5319 



■ Power Button Board 
922-5388 




- Battery Module 
661-2731 



Power Supply 661-2734 



Controller Card 661-2733 
Processor 661 -2735 
Memory 128 MB 661-2642 
Memory 512 MB 661-2564 



Exploded View 



Xserve RAID Views - 1 




External Views 



Front Panel 



Mute Button - 
A System Identifier Button and Light - 
A A Drive Module Lock and Status Llight- 




Power Supply Status Light 

■Cooling System Status Light 

I—Temperature Status Light 

■Controller Status Light 



-Drive Module 
Activity and 
Status Lights 



Drive Modules 
Fibre Channel Link Lights 



2-Xserve RAID Views 



External Views 



Back Panel 



Power Supply 
Status Lights 



Mute Button ■ 

System Identifier . 
Button and Light 

Optional Battery ■ 
Module Bay (2) 



Controller Status Light 

Cooling Module Status Light 



■RAID 
Controller 
Reset 
Button 



r Power (!) 
Button 
and Light 




Power Supply (2) 

Power Socket (2) 
RAID Controller Module and Status Light (2) 



Fibre Channel Port and Status 
Light (2) 

Ethernet Port and Status 

Light (2) <»> 

UPS Interface Port (2) @ 
Cooling Module (2) 



External Views 



Xserve RAID Views - 3